CN218934868U

CN218934868U - Hydraulic control system and working machine

Info

Publication number: CN218934868U
Application number: CN202223588477.5U
Authority: CN
Inventors: 王康
Original assignee: Hunan Sany Zhongyi Machinery Co Ltd
Current assignee: Hunan Sany Zhongyi Machinery Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-04-28
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to the technical field of hydraulic systems, and provides a hydraulic control system and a working machine. In the hydraulic control system, an oil outlet of a hydraulic pump is connected with an oil inlet of a main section vibrating motor. An oil return port of the main section vibrating motor is connected with an oil inlet of the control main valve. The first working oil port of the control main valve is connected with the oil tank, and the second working oil port of the control main valve is connected with the oil inlet of the telescopic section vibrating motor group. And an oil return port of the telescopic section vibrating motor group is connected with an oil tank. The control main valve is used for controlling the oil return port of the main section vibrating motor to be communicated with one of the oil inlets of the oil tank and the telescopic section vibrating motor group. Therefore, the hydraulic pump independently drives the main section vibrating motor to operate or simultaneously drives the main section vibrating motor and the telescopic section vibrating motor group to operate by adjusting the working position of the control main valve. The hydraulic system can use the same hydraulic pump to drive the main section vibrating motor and the telescopic section vibrating motor to act simultaneously, and the cost is relatively low.

Description

Hydraulic control system and working machine

Technical Field

The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic control system and a working machine.

Background

Paver is an extremely important road construction machine. The paver is provided with a screed plate which is used for pre-flattening paving materials. To promote the applicability of the screed, the screed is typically provided in a telescopic configuration. The telescoping screed comprises a main section and a telescoping section. The main section vibrating motor and the telescopic section vibrating motor for driving the pre-pressing operation of the main section vibrating motor and the telescopic section vibrating motor are respectively arranged on the main section and the telescopic section of the ironing plate. In the existing vibrating hydraulic control system, two hydraulic pumps are generally used for respectively driving a main section vibrating motor and a telescopic section vibrating motor to act. This results in a relatively high cost of the hydraulic control system.

Disclosure of Invention

The utility model provides a hydraulic control system and a working machine, which are used for solving or improving the problem of relatively high cost caused by the fact that two hydraulic pumps are used for respectively driving a main section vibrating motor and a telescopic section vibrating motor in the existing vibrating hydraulic control system.

According to a first aspect of the present utility model, there is provided a hydraulic control system including a hydraulic pump, a main section vibrating motor, a telescopic section vibrating motor group, a control main valve, and an oil tank.

The oil outlet of the hydraulic pump is connected with the oil inlet of the main section vibrating motor. And an oil return port of the main section vibrating motor is connected with an oil inlet of the control main valve. The first working oil port of the control main valve is connected with the oil tank, and the second working oil port of the control main valve is connected with the oil inlet of the telescopic section vibrating motor group. And an oil return port of the telescopic section vibrating motor group is connected with the oil tank. The control main valve is used for controlling the oil return port of the main section vibrating motor to be communicated with one of the oil tank and the oil inlet of the telescopic section vibrating motor group.

According to the hydraulic control system provided by the utility model, the control main valve comprises a first working position and a second working position.

In the state of the first working position, an oil inlet of the control main valve is communicated with the first working oil port, and an oil return port of the main section vibrating motor is communicated with the oil tank through the control main valve;

and in the state of the second working position, an oil inlet of the control main valve is communicated with the second working oil port, and an oil return port of the main section vibrating motor is communicated with an oil inlet of the telescopic section vibrating motor group through the control main valve.

According to the hydraulic control system provided by the utility model, the telescopic section vibrating motor group comprises a first telescopic section vibrating motor and a second telescopic section vibrating motor.

The second working oil port of the control main valve is respectively connected with the oil inlet of the first telescopic section vibrating motor and the oil inlet of the second telescopic section vibrating motor. The oil return port of the first telescopic section vibrating motor is connected with the oil tank.

According to the hydraulic control system provided by the utility model, the hydraulic control system further comprises a flow dividing valve.

And an oil inlet of the flow dividing valve is connected with a second working oil port of the control main valve. And a first oil outlet of the flow dividing valve is connected with an oil inlet of the first telescopic section vibrating motor. And a second oil outlet of the flow dividing valve is connected with an oil inlet of the second telescopic section vibrating motor.

According to the hydraulic control system provided by the utility model, the split ratio of the first oil outlet to the second oil outlet of the split valve is 1:1.

The hydraulic control system provided by the utility model further comprises a first telescopic section vibration control valve.

The oil inlet of the first telescopic section vibration control valve is connected with the first oil outlet of the flow dividing valve. And an oil outlet of the first telescopic section vibration control valve is connected with the oil tank. The first telescopic section vibration control valve comprises a first vibration position and a first unloading position.

In the state of the first vibration position, a first oil outlet of the flow dividing valve is blocked from the oil tank; and in the state of the first unloading position, a first oil outlet of the flow dividing valve is communicated with the oil tank.

According to the hydraulic control system provided by the utility model, the hydraulic control system further comprises a second telescopic section vibration control valve.

The oil inlet of the second telescopic section vibration control valve is connected with the second oil outlet of the flow dividing valve, and the oil outlet of the second telescopic section vibration control valve is connected with the oil tank. The second telescopic section vibration control valve comprises a second vibration position and a second unloading position.

In the state of the second vibrating position, a second oil outlet of the flow dividing valve is blocked from the oil tank; and in the state of the second unloading position, a second oil outlet of the flow dividing valve is communicated with the oil tank.

According to the hydraulic control system provided by the utility model, the control main valve, the first telescopic section vibration control valve and the second telescopic section vibration control valve are all electromagnetic valves.

According to the hydraulic control system provided by the utility model, the hydraulic control system further comprises a protection oil circuit. And a safety valve is arranged on the protection oil circuit. The first end of the protection oil circuit is connected with the connecting oil circuit between the main section vibrating motor and the control main valve, and the second end of the protection oil circuit is connected with the oil tank.

According to a second aspect of the present utility model there is provided a work machine comprising a hydraulic control system as described above.

In the hydraulic control system provided by the utility model, the oil outlet of the hydraulic pump is connected with the oil inlet of the main section vibrating motor so as to drive the main section vibrating motor to operate. The oil return port of the main section vibrating motor is connected with the oil inlet of the oil tank or the telescopic section vibrating motor group through a control main valve. Or the control main valve is used for controlling the oil return port of the main section vibrating motor to be communicated with one of the oil tank and the oil inlet of the telescopic section vibrating motor group. And an oil return port of the telescopic section vibrating motor group is connected with an oil tank.

In the working process, when the main section vibrating motor is required to independently operate, the working position of the control main valve is adjusted, so that the oil inlet of the control main valve is communicated with the first working oil port of the control main valve, and then the oil return port of the main section vibrating motor is communicated with the oil tank through the control main valve. At this time, the hydraulic pump can drive the main section vibrating motor to independently operate. When the main section vibrating motor and the telescopic section vibrating motor group are required to run simultaneously, the working position of the main control valve is adjusted, so that the oil inlet of the main control valve is communicated with the second working oil port of the main control valve, and then the oil return port of the main section vibrating motor is communicated with the oil inlet of the telescopic section vibrating motor group through the main control valve. At this time, the oil output by the hydraulic pump drives the main section vibrating motor to operate, and meanwhile, the oil at the oil return port of the main section vibrating motor drives the telescopic section vibrating motor set to operate.

Through the structure, the oil return port of the main section vibrating motor is connected with the oil inlet or the oil tank of the telescopic section vibrating motor group through the control main valve. The hydraulic pump can independently drive the main section vibrating motor to operate or simultaneously drive the main section vibrating motor and the telescopic section vibrating motor group to operate by adjusting the working position of the control main valve. Therefore, the hydraulic system can use the same hydraulic pump to drive the main section vibrating motor and the telescopic section vibrating motor to act simultaneously, and the cost is relatively low.

Further, since the work machine includes the hydraulic control system as described above, it also has the advantages as described above.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hydraulic control system according to the present utility model, wherein a control main valve is in a first operating position;

FIG. 2 is a second schematic diagram of the hydraulic control system of the present utility model wherein the control main valve is in a second operating position;

reference numerals:

100. a hydraulic pump; 200. a main section vibrating motor; 300. a vibrating motor group of the telescopic section; 301. a first telescopic section vibrating motor; 302. a second telescopic section vibrating motor; 400. controlling a main valve; 401. a first working position; 402. a second working position; 500. an oil tank; 600. a diverter valve; 601. an oil inlet of the diverter valve; 602. a first oil outlet; 603. a second oil outlet; 700. a first telescopic section vibration control valve; 701. a first vibrating position; 702. a first unloading bit; 800. the second telescopic section vibrates the control valve; 801. the second vibrating position; 802. a second unloading bit; 900. a safety valve.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, described in this specification may be combined and combined to further clarify the objects, aspects and advantages of embodiments of the present utility model, without departing from the spirit and scope of the utility model, and it should be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A hydraulic control system and a work machine according to embodiments of the present utility model are described below with reference to fig. 1 and 2. It should be understood that the following description is only illustrative of the embodiments of the utility model and is not intended to limit the utility model in any way.

An embodiment of the first aspect of the present utility model provides a hydraulic control system including a hydraulic pump 100, a main section vibrating motor 200, a telescopic section vibrating motor group 300, a control main valve 400, and an oil tank 500, as shown in fig. 1 and 2.

Wherein, the oil outlet of the hydraulic pump 100 is connected with the oil inlet of the main section vibrating motor 200. An oil return port of the main section vibrating motor 200 is connected with an oil inlet of the control main valve 400. The first working oil port of the control main valve 400 is connected with the oil tank 500, and the second working oil port of the control main valve 400 is connected with the oil inlet of the telescopic section vibrating motor group 300. The oil return port of the telescopic section vibrating motor group 300 is connected with the oil tank 500. The control main valve 400 is used for controlling the oil return port of the main section vibrating motor 200 to be communicated with one of the oil tank 500 and the oil inlet of the telescopic section vibrating motor group 300.

In the hydraulic control system provided by the utility model, the oil outlet of the hydraulic pump 100 is connected with the oil inlet of the main section vibrating motor 200 to drive the main section vibrating motor 200 to operate. The oil return port of the main section vibrating motor 200 is connected with the oil inlet of the oil tank 500 or the telescopic section vibrating motor group 300 through the control main valve 400. In other words, the control main valve 400 is used to control the oil return port of the main section vibrating motor 200 to communicate with one of the oil tank 500 and the oil inlet of the telescopic section vibrating motor group 300. The oil return port of the telescopic section vibrating motor group 300 is connected with the oil tank 500.

In the working process, when the main section vibrating motor 200 is required to independently operate, the working position of the control main valve 400 is adjusted, so that the oil inlet of the control main valve 400 is communicated with the first working oil port of the control main valve 400, and then the oil return port of the main section vibrating motor 200 is communicated with the oil tank 500 through the control main valve 400. At this time, the hydraulic pump 100 can drive the main stage vibration motor 200 to operate independently. When the main section vibrating motor 200 and the telescopic section vibrating motor group 300 are required to run simultaneously, the working position of the control main valve 400 is adjusted, so that the oil inlet of the control main valve 400 is communicated with the second working oil port of the control main valve, and the oil return port of the main section vibrating motor 200 is communicated with the oil inlet of the telescopic section vibrating motor group 300 through the control main valve 400. At this time, the oil outputted from the hydraulic pump 100 drives the main section vibrating motor 200 to operate, and at the same time, the oil at the oil return port of the main section vibrating motor 200 drives the telescopic section vibrating motor group 300 to operate.

With this structural arrangement, the oil return port of the main section vibrating motor 200 is connected to the oil inlet or oil tank 500 of the telescopic section vibrating motor group 300 through the control main valve 400. The hydraulic pump 100 is made to independently drive the main section vibrating motor 200 or simultaneously drive the main section vibrating motor 200 and the telescopic section vibrating motor group 300 to operate by adjusting the working position of the control main valve 400. Thus, the hydraulic system can drive the main section vibrating motor 200 and the telescopic section vibrating motor to operate simultaneously using the same hydraulic pump 100, which is relatively low in cost.

It should be noted here that the present utility model is not limited in any way with respect to the specific type of the hydraulic pump 100. In the embodiment shown in fig. 1, the hydraulic pump 100 is a variable displacement pump.

In one embodiment of the present utility model, as shown in fig. 1 and 2, the control main valve 400 includes a first operating position 401 and a second operating position 402.

In the state of the first working position 401, an oil inlet of the control main valve 400 is communicated with a first working oil port, and an oil return port of the main section vibrating motor 200 is communicated with the oil tank 500 through the control main valve 400;

in the state of the second working position 402, the oil inlet of the control main valve 400 is communicated with the second working oil port, and the oil return port of the main section vibrating motor 200 is communicated with the oil inlet of the telescopic section vibrating motor group 300 through the control main valve 400.

For example, the control main valve 400 comprises a two-position three-way reversing valve. The two-position three-way reversing valve comprises an oil inlet, a first working oil port and a second working oil port. The two-position three-way reversing valve comprises a first working position 401 and a second working position 402. The oil inlet is connected with an oil return port of the main section vibrating motor 200, the first working oil port is connected with the oil tank 500, and the second working oil port is connected with an oil inlet of the telescopic section vibrating motor group 300.

In the state of the first working position 401, the oil inlet of the two-position three-way reversing valve is mutually communicated with the first working oil port, so that the oil return port of the main section vibrating motor 200 is communicated with the oil tank 500 through the two-position three-way reversing valve.

In the state of the second working position 402, the oil inlet of the two-position three-way reversing valve is communicated with the second working oil port, so that the oil return port of the main section vibrating motor 200 is communicated with the oil inlet of the telescopic section vibrating motor group 300 through the two-position three-way reversing valve.

In one embodiment of the present utility model, the telescoping section vibrating motor group 300 includes a first telescoping section vibrating motor 301 and a second telescoping section vibrating motor 302.

The second working oil port of the control main valve 400 is connected to an oil inlet of the first telescopic section vibrating motor 301 and an oil inlet of the second telescopic section vibrating motor 302, respectively. The oil return port of the first telescopic section vibrating motor 301 and the oil return port of the second telescopic section vibrating motor 302 are connected with the oil tank 500.

In the state of the second working position 402, the oil return port of the main section vibrating motor 200 is connected with the oil inlet of the first telescopic section vibrating motor 301 and the oil inlet of the second telescopic section vibrating motor 302, respectively.

Specifically, the screed plate includes a main section and a telescoping section. The telescoping section includes a first telescoping section and a second telescoping section. The first telescopic section and the second telescopic section are respectively positioned at two ends of the main section, so that the pre-pressing range of the ironing plate is respectively adjusted at two ends of the main section. The vibrating operation of the first telescopic section is driven by the first telescopic section vibrating motor 301. The second telescopic section vibrating operation is driven by the second telescopic section vibrating motor 302.

The oil inlet of the first telescopic section vibrating motor 301 and the oil inlet of the second telescopic section vibrating motor 302 are connected with the oil return port of the main section vibrating motor 200 through the control main valve 400. The oil drain of the main section vibrating motor 200, the oil drain of the first telescopic section vibrating motor 301 and the oil drain of the second telescopic section vibrating motor 302 are all communicated with the oil tank 500. When the control main valve 400 is switched to the first working position 401, both the oil inlet of the first telescopic section vibrating motor 301 and the oil inlet of the second telescopic section vibrating motor 302 are cut off from the oil return port of the main section vibrating motor 200, and the main section vibrating motor 200 returns to the oil tank 500 in the independent operation process. When the control main valve 400 is switched to the second working position 402, the oil inlet of the first telescopic section vibrating motor 301 and the oil inlet of the second telescopic section vibrating motor 302 are both communicated with the oil return port of the main section vibrating motor 200. At this time, when the hydraulic pump 100 is turned on, the main section vibrating motor 200, the first telescopic section vibrating motor 301, and the second telescopic section vibrating motor 302 can be operated simultaneously.

It should be noted here that the present utility model is not limited in any way with respect to the specific types of the main section vibrating motor 200, the first telescopic section vibrating motor 301, and the second telescopic section vibrating motor 302. For example, in one embodiment of the present utility model, the main section vibrating motor 200 is a plunger motor, and the first telescopic section vibrating motor 301 and the second telescopic section vibrating motor 302 are gear motors.

In one embodiment of the present utility model, the hydraulic control system further includes a diverter valve 600.

The oil inlet 601 of the diverter valve 600 is connected with the second working oil port of the control main valve 400, the first oil outlet 602 of the diverter valve 600 is connected with the oil inlet of the first telescopic section vibrating motor 301, and the second oil outlet 603 of the diverter valve 600 is connected with the oil inlet of the second telescopic section vibrating motor 302.

Further, in one embodiment of the utility model, the split ratio of first oil outlet 602 to second oil outlet 603 of splitter valve 600 is 1:1. The displacement of the first telescopic section vibrating motor 301 is equal to the displacement of the second telescopic section vibrating motor 302. The displacement of the main section vibrating motor 200 is twice that of the first telescopic section vibrating motor 301.

For example, as shown in fig. 1, the oil inlet 601 of the diverter valve is connected to the second working port of the two-position three-way diverter valve. When the control main valve 400 is switched to the second working position 402, an oil return port of the main section vibrating motor 200 is communicated with an oil inlet 601 of the flow dividing valve. The first oil outlet 602 and the second oil outlet 603 of the diverter valve 600 are respectively connected with the oil inlet of the first telescopic section vibrating motor 301 and the oil inlet of the second telescopic section vibrating motor 302. More specifically, the split ratio of the splitter valve 600 is 1:1. That is, the oil discharged from the oil return port of the main section vibrating motor 200 is evenly distributed to the first telescopic section vibrating motor 301 and the second telescopic section vibrating motor 302 through the flow dividing valve 600. And the displacement of the main section vibrating motor 200 is twice that of the first telescopic section vibrating motor 301. Thus, when the main section vibrating motor 200, the first telescopic section vibrating motor 301, and the second telescopic section vibrating motor 302 are simultaneously operated, the rotational speeds of the three are equal. Furthermore, the pre-pressing effect of the main section, the first telescopic section and the second telescopic section in the screed plate can be improved.

In one embodiment of the present utility model, the hydraulic control system further includes a first telescoping section tamper control valve 700.

The oil inlet of the first telescopic section vibration control valve 700 is connected with the first oil outlet 602 of the flow dividing valve 600, and the oil outlet of the first telescopic section vibration control valve 700 is connected with the oil tank 500. The first telescoping section tamper control valve 700 includes a first tamper bit 701 and a first unload bit 702.

In the state of the first vibrating position 701, the first oil outlet 602 of the flow divider 600 is blocked from the oil tank 500; in the state of the first unloading position 702, the first oil outlet 602 of the flow dividing valve 600 communicates with the oil tank 500.

Further, in one embodiment of the present utility model, the hydraulic control system further includes a second telescoping section tamper control valve 800.

The oil inlet of the second telescopic section vibration control valve 800 is connected with the second oil outlet 603 of the flow dividing valve 600, and the oil outlet of the second telescopic section vibration control valve 800 is connected with the oil tank 500. The second telescoping section tamper control valve 800 includes a second tamper bit 801 and a second unload bit 802.

In the state of the second vibration position 801, the second oil outlet 603 of the flow dividing valve 600 is blocked from the oil tank 500; in the state of the second unloading position 802, the second oil outlet 603 of the flow dividing valve 600 communicates with the oil tank 500.

As shown in fig. 1 and 2, the first expansion section vibration control valve 700 and the second expansion section vibration control valve 800 are two-position two-way reversing valves. An oil inlet of the first telescopic section vibration control valve 700 is connected with a first oil outlet 602 of the flow dividing valve 600, and an oil outlet of the first telescopic section vibration control valve 700 is connected with the oil tank 500. An oil inlet of the second telescopic section vibration control valve 800 is connected with a second oil outlet 603 of the flow dividing valve 600, and an oil outlet of the second telescopic section vibration control valve 800 is connected with the oil tank 500.

When the main section vibrating motor 200 and the first telescopic section vibrating motor 301 are required to operate simultaneously, the main control valve is switched to the second working position 402, and meanwhile, the first telescopic section vibrating control valve 700 is switched to the first vibrating position 701 and the second telescopic section vibrating control valve 800 is switched to the second unloading position 802. At this time, the oil discharged from the first oil outlet 602 of the flow divider 600 can enter the oil inlet of the first telescopic section vibrating motor 301 and drive the first telescopic section vibrating motor 301 to operate; the oil discharged from the second oil outlet 603 of the flow dividing valve 600 flows back to the oil tank 500 through the oil inlet and the oil outlet of the second telescopic section vibration control valve 800.

Similarly, when the main section vibration motor 200 and the second telescopic section vibration motor 302 are required to operate simultaneously, the main control valve is switched to the second working position 402, and at the same time, the first telescopic section vibration control valve 700 is switched to the first unloading position 702, and the second telescopic section vibration control valve 800 is switched to the second vibration position 801. At this time, the oil discharged from the first oil outlet 602 of the flow dividing valve 600 flows back to the oil tank 500 through the oil inlet and the oil outlet of the first telescoping section vibration control valve 700; the oil discharged from the second oil outlet 603 of the diverter valve 600 can enter the oil inlet of the second telescopic section vibrating motor 302 and drive the second telescopic section vibrating motor 302 to operate.

Similarly, when the main section vibration motor 200, the first expansion section vibration motor 301, and the second expansion section vibration motor 302 are required to operate simultaneously, as shown in fig. 2, the control main valve 400 is switched to the second working position 402, and the first expansion section vibration control valve 700 is switched to the first vibration position 701, and the second expansion section vibration control valve 800 is switched to the second vibration position 801.

As can be seen from the above-described embodiments, by providing the first telescopic section vibration control valve 700 and the second telescopic section vibration control valve 800, the working states of the first telescopic section vibration motor 301 and the second telescopic section vibration motor 302 can be independently adjusted, so that the hydraulic control system can meet the requirements of more multiple working conditions.

In one embodiment of the present utility model, a protection oil path is further included. The protection oil path is provided with a safety valve 900. The first end of the protection oil path is connected with a connection oil path between the main section vibrating motor 200 and the control main valve 400. The second end of the protection oil passage is connected to the oil tank 500. That is, a relief valve 900 is provided between the oil return port of the main section vibrating motor 200 and the oil tank 500. Among them, the relief valve 900 includes, but is not limited to, a relief valve. The relief valve 900 has a relief opening pressure set therein. When the pressure output from the oil return port of the main section vibrating motor 200 is greater than the safety opening pressure, the safety valve 900 is opened. The main section vibrating motor 200 is unloaded with its oil return port communicating with the oil tank 500, thereby enabling pressure protection to be provided to the telescopic section vibrating motor group 300.

In one embodiment of the present utility model, the control main valve 400, the first telescopic section vibration control valve 700 and the second telescopic section vibration control valve 800 are all solenoid valves. For example, in the embodiment shown in fig. 1, the control main valve 400 is a two-position three-way electromagnetic directional valve, and the first expansion section vibration control valve 700 and the second expansion section vibration control valve 800 are two-position two-way electromagnetic directional valves. Therefore, the working state of each control valve is not required to be manually adjusted, and the adjusting process is time-saving and labor-saving.

Embodiments of the second aspect of the present utility model provide a work machine comprising a hydraulic control system as described above.

For example, in one embodiment of the present disclosure, the work machine is a paver. The paver comprises a screed. The screed comprises a main section and a telescopic section. The main section vibrating motor 200 is connected with the main section and drives the main section to perform pre-pressing operation. The telescopic section vibrating motor group 300 is connected with the telescopic section and drives the telescopic section to perform pre-pressing operation.

It should be understood herein that the above-described embodiment is only one exemplary embodiment of the present utility model and should not be construed as limiting the present utility model in any way. That is, specific types of work machines described above include, but are not limited to, pavers.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A hydraulic control system is characterized by comprising a hydraulic pump, a main section vibrating motor, a telescopic section vibrating motor group, a control main valve and an oil tank,

the hydraulic pump comprises a hydraulic pump, a main section vibrating motor, an oil return port, a control main valve, a first working oil port, a second working oil port, an oil return port and an oil tank, wherein the oil outlet of the hydraulic pump is connected with the oil inlet of the main section vibrating motor, the oil return port of the main section vibrating motor is controlled by the control main valve, and the oil return port of the main section vibrating motor is communicated with one of the oil tank and the oil inlet of the main section vibrating motor.

2. The hydraulic control system of claim 1, wherein the control main valve includes a first operating position and a second operating position,

3. The hydraulic control system of claim 2, wherein the telescoping section vibrating motor assembly includes a first telescoping section vibrating motor and a second telescoping section vibrating motor,

the second working oil port of the control main valve is respectively connected with the oil inlet of the first telescopic section vibrating motor and the oil inlet of the second telescopic section vibrating motor, and the oil return port of the first telescopic section vibrating motor and the oil return port of the second telescopic section vibrating motor are connected with the oil tank.

4. The hydraulic control system of claim 3, further comprising a diverter valve,

the oil inlet of the flow dividing valve is connected with the second working oil port of the control main valve, the first oil outlet of the flow dividing valve is connected with the oil inlet of the first telescopic section vibrating motor, and the second oil outlet of the flow dividing valve is connected with the oil inlet of the second telescopic section vibrating motor.

5. The hydraulic control system of claim 4, wherein a split ratio of the first oil outlet to the second oil outlet of the splitter valve is 1:1.

6. The hydraulic control system of claim 4, further comprising a first telescoping section tamper control valve,

the oil inlet of the first telescopic section vibration control valve is connected with a first oil outlet of the flow dividing valve, the oil outlet of the first telescopic section vibration control valve is connected with the oil tank, and the first telescopic section vibration control valve comprises a first vibration position and a first unloading position;

in the state of the first vibration position, a first oil outlet of the flow dividing valve is blocked from the oil tank;

and in the state of the first unloading position, a first oil outlet of the flow dividing valve is communicated with the oil tank.

7. The hydraulic control system of claim 6, further comprising a second telescoping section tamper control valve,

the oil inlet of the second telescopic section vibration control valve is connected with a second oil outlet of the flow dividing valve, the oil outlet of the second telescopic section vibration control valve is connected with the oil tank, and the second telescopic section vibration control valve comprises a second vibration position and a second unloading position;

in the state of the second vibrating position, a second oil outlet of the flow dividing valve is blocked from the oil tank;

and in the state of the second unloading position, a second oil outlet of the flow dividing valve is communicated with the oil tank.

8. The hydraulic control system of claim 7, wherein the control main valve, the first telescoping section vibration control valve, and the second telescoping section vibration control valve are solenoid valves.

9. The hydraulic control system according to claim 1, further comprising a protection oil passage, wherein a safety valve is provided on the protection oil passage, a first end of the protection oil passage is connected to a connection oil passage between the main section vibrating motor and the control main valve, and a second end of the protection oil passage is connected to the oil tank.

10. A work machine comprising a hydraulic control system according to any one of claims 1 to 9.